ipv6 route: use err pointers instead of returning pointer by reference
This patch makes ip6_route_info_create return err pointer instead of
returning the rt pointer by reference as suggested by Dave
Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 4320ddc..db5b54a 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -1724,21 +1724,21 @@
return -EINVAL;
}
-int ip6_route_info_create(struct fib6_config *cfg, struct rt6_info **rt_ret)
+static struct rt6_info *ip6_route_info_create(struct fib6_config *cfg)
{
- int err;
struct net *net = cfg->fc_nlinfo.nl_net;
struct rt6_info *rt = NULL;
struct net_device *dev = NULL;
struct inet6_dev *idev = NULL;
struct fib6_table *table;
int addr_type;
+ int err = -EINVAL;
if (cfg->fc_dst_len > 128 || cfg->fc_src_len > 128)
- return -EINVAL;
+ goto out;
#ifndef CONFIG_IPV6_SUBTREES
if (cfg->fc_src_len)
- return -EINVAL;
+ goto out;
#endif
if (cfg->fc_ifindex) {
err = -ENODEV;
@@ -1958,9 +1958,7 @@
cfg->fc_nlinfo.nl_net = dev_net(dev);
- *rt_ret = rt;
-
- return 0;
+ return rt;
out:
if (dev)
dev_put(dev);
@@ -1969,20 +1967,21 @@
if (rt)
dst_free(&rt->dst);
- *rt_ret = NULL;
-
- return err;
+ return ERR_PTR(err);
}
int ip6_route_add(struct fib6_config *cfg)
{
struct mx6_config mxc = { .mx = NULL, };
- struct rt6_info *rt = NULL;
+ struct rt6_info *rt;
int err;
- err = ip6_route_info_create(cfg, &rt);
- if (err)
+ rt = ip6_route_info_create(cfg);
+ if (IS_ERR(rt)) {
+ err = PTR_ERR(rt);
+ rt = NULL;
goto out;
+ }
err = ip6_convert_metrics(&mxc, cfg);
if (err)
@@ -2871,9 +2870,12 @@
r_cfg.fc_encap_type = nla_get_u16(nla);
}
- err = ip6_route_info_create(&r_cfg, &rt);
- if (err)
+ rt = ip6_route_info_create(&r_cfg);
+ if (IS_ERR(rt)) {
+ err = PTR_ERR(rt);
+ rt = NULL;
goto cleanup;
+ }
err = ip6_route_info_append(&rt6_nh_list, rt, &r_cfg);
if (err) {